Re: UFS block size vs. write speed

2001-04-24 Thread Mike Silbersack
On Tue, 24 Apr 2001, Niek Bergboer wrote: > On Mon, Apr 23, 2001 at 12:09:26PM -0500, Mike Silbersack wrote: > > On Mon, 23 Apr 2001, Niek Bergboer wrote: > > > I've implemented a quick hack on the BSD ftp-client: in the original > > > recv-file function data is read from a socket into a buffer,

Re: UFS block size vs. write speed

2001-04-24 Thread Peter Pentchev
On Tue, Apr 24, 2001 at 10:43:29AM +0100, Bob Bishop wrote: > Hi, > > At 11:35 24/04/01 +0200, Niek Bergboer wrote: > >[...] > >In fact, I couldn't care less if the allocated blocks contain random > >data (rather than zeros), since I'll be overwriting them immediately. > > You *should* care: the

Re: UFS block size vs. write speed

2001-04-24 Thread Bob Bishop
Hi, At 11:35 24/04/01 +0200, Niek Bergboer wrote: >[...] >In fact, I couldn't care less if the allocated blocks contain random >data (rather than zeros), since I'll be overwriting them immediately. You *should* care: the blocks are zeroed for security reasons. -- Bob Bishop +44

Re: UFS block size vs. write speed

2001-04-24 Thread Niek Bergboer
On Mon, Apr 23, 2001 at 12:09:26PM -0500, Mike Silbersack wrote: > On Mon, 23 Apr 2001, Niek Bergboer wrote: > > I've implemented a quick hack on the BSD ftp-client: in the original > > recv-file function data is read from a socket into a buffer, which is > > then written to a file. I've mmap-ed t

Re: UFS block size vs. write speed

2001-04-23 Thread Mike Silbersack
On Mon, 23 Apr 2001, Niek Bergboer wrote: > I've implemented a quick hack on the BSD ftp-client: in the original > recv-file function data is read from a socket into a buffer, which is > then written to a file. I've mmap-ed the file, and rather than reading > from the socket into the buffer, I r

Re: UFS block size vs. write speed

2001-04-23 Thread Niek Bergboer
On Fri, Apr 20, 2001 at 05:54:26AM -0700, Alfred Perlstein wrote: > > PS: The tests were already done with the fs mounted async. The > > drive in question communicates at UDMA/33 on a PIIX4 controller in > > an AMD K6/2 233 system. > It's funny, but you have the ideal system for an interesting > o

Re: UFS block size vs. write speed

2001-04-21 Thread Andrew Hesford
On Sat, Apr 21, 2001 at 08:01:20AM -0700, David O'Brien wrote: > On Fri, Apr 20, 2001 at 10:47:48AM -0500, Andrew Hesford wrote: > > I do see both synchronous writes and asynchronous writes on my > > filesystem (as reported by mount); what are these? > > The default mount is "nosync". synchronou

Re: UFS block size vs. write speed

2001-04-21 Thread David O'Brien
On Fri, Apr 20, 2001 at 10:47:48AM -0500, Andrew Hesford wrote: > I do see both synchronous writes and asynchronous writes on my > filesystem (as reported by mount); what are these? The default mount is "nosync". synchronous metadata, asynchronous data. Compare with the "async" and "sync" mount

Re: UFS block size vs. write speed

2001-04-21 Thread David O'Brien
On Fri, Apr 20, 2001 at 07:52:03AM -0700, Alfred Perlstein wrote: > > Soft updates isn't an "async" or "sync" thing. It combines synchronous > > and asynchronous transfers. If I'm not mistaken, all metadata is > > synchronously written, and all data is asynchronously written. > > You're mistaken,

Re: UFS block size vs. write speed

2001-04-20 Thread Andrew Hesford
On Fri, Apr 20, 2001 at 07:52:03AM -0700, Alfred Perlstein wrote: > You're mistaken, what you're describing is the old > non-async/non-softupdates way. I do see both synchronous writes and asynchronous writes on my filesystem (as reported by mount); what are these? Is soft updates simply structu

Re: UFS block size vs. write speed

2001-04-20 Thread Alfred Perlstein
* Andrew Hesford <[EMAIL PROTECTED]> [010420 07:37] wrote: > On Fri, Apr 20, 2001 at 03:20:29PM +0200, Niek Bergboer wrote: > > Isn't it true that softupdates only work when filesystems are mounted > > sync? Or does it also improve performance when filesystems are > > mounted async? > > The othe

Re: UFS block size vs. write speed

2001-04-20 Thread Andrew Hesford
On Fri, Apr 20, 2001 at 03:20:29PM +0200, Niek Bergboer wrote: > Isn't it true that softupdates only work when filesystems are mounted > sync? Or does it also improve performance when filesystems are > mounted async? The other guy was right; you really do need to wrap text at around 70 lines (I h

Re: UFS block size vs. write speed

2001-04-20 Thread Alfred Perlstein
you really need to try harder to wrap lines properly. * Niek Bergboer <[EMAIL PROTECTED]> [010420 06:17] wrote: > On Fri, Apr 20, 2001 at 05:54:26AM -0700, Alfred Perlstein wrote: > > * Niek Bergboer <[EMAIL PROTECTED]> [010420 05:43] wrote: > > > b.) Are there other newfs options that I can use

Re: UFS block size vs. write speed

2001-04-20 Thread Niek Bergboer
On Fri, Apr 20, 2001 at 05:54:26AM -0700, Alfred Perlstein wrote: > * Niek Bergboer <[EMAIL PROTECTED]> [010420 05:43] wrote: > > b.) Are there other newfs options that I can use to increase throughput? > Have you tried softupdates? Isn't it true that softupdates only work when filesystems are mo

Re: UFS block size vs. write speed

2001-04-20 Thread Alfred Perlstein
ugh, dude, please wrap lines at 70 characters. :( * Niek Bergboer <[EMAIL PROTECTED]> [010420 05:43] wrote: > Hello, > > I've got a machine connected to a 100 MBit/FDX network and I > would like to store largish (~20 MB or bigger) files on it that > are downloaded from the network over a dc card

UFS block size vs. write speed

2001-04-20 Thread Niek Bergboer
Hello, I've got a machine connected to a 100 MBit/FDX network and I would like to store largish (~20 MB or bigger) files on it that are downloaded from the network over a dc card. The only consideration here is speed since the files are all temporary. I'm running FreeBSD 4.3-RC1. The dc card